Pump-driving mechanism



' G. L. MCC/UN.

PUMP DRIVING MECHNISM; APPLICATION FILED NOV. 30; T917-i l l,38299'7;v PabendJune 28, 1921 VENTORl Y Lawa@ mmf ATTORNEY e m s l @w1 Y M 1 x .SINA T lflaf AUNITED STATES-PATENT OFFICE.

GEORGE I.. MccAIN, OF DETROIT, MICHIGAN, AssIeNOru To 'PACKARD Moronu can COMPANY, or DETROIT, MICHIGAN, a CORPORATION OF MIGIIIGAN.

:PUMP-DRIVING MECHANISM.

iigasaeer.

Specification of Letters Patent. Patented June 2.89 1921.

Application filed November 30, 1917. Serial No. 204,755.

To all whom it may concern Be it known that I, GEORGE L. MCC'AIN, a citizen of the United States, and resident .of Detroit, Wayne county, State of Michinism as used in connection with the water pump of a hydrocarbonl motor.

One of the objects of the invention is to provide an eiiicient driving mechanism for a water lpump together with a packing for the pump shaft that will automatically take up wear.

Another object of the invention is to prov vide a hydrocarbon motor with a 'water pump and a shaft extending from the motor casing to the pump impeller together, with means to prevent leakage along the shaft both from the motor casing and from the pump casing.

Other obj ects of the invention will appear from the following description taken in connection with the drawings which form a part of this specication, and in which- Figure 1 is a sectional view of a pump driving mechanism embodying the invention; and

Fig. 2 is a transverse section on the line 2-2 of Figvl'.-

Referringto the drawings, 10 represents one of the walls of a hydrocarbon motor crank casing or base and 11 is a pump casing whichv is shown as detachably connected to the motor casing as by a series of bolts, 'one of which is shown at 12. The pump impeller' is shown at 13 as mounted in the pump casing, 14 indicates the inlet to the casing, and 15 is the circumferential chamber at the periphery of the impeller and which connects with the outlet from the casing.

The impeller is driven by a shaft 16 to which it is connected as ,by the nut 17, and this shaft is mounted in alined bearings in the motor and pump casings. In the pump casing the bearing is plain as at 18 and in the motor casin a ball bearing 19 is provided forthesha .'1-

It is desirable that lubricant shall not escape from the motor casing and for this purpose a throw-Off ring 2O is mounted on 'may be renewed and the ing 19, this ring being provided with two anges 21 from which the lubricant isv thrown into a recess 22 and from there v drained back into the crank case through a passage 23. Leakage of water from the pump along the shaft 16 is prevented by a packing ring,

24 which surrounds the shaft and is arranged 1n a recess 25 somewhatlarger than the shaft. A sliding sleeve 26 also surrounds the shaft 16 and is arranged in a cylindrical extension 27 of the motor casing 10, this extension surrounding shaft 16 and practically covering the latter between the motor casing 10 and the pump casing 11. The sleeve 26 Vextends into the recess 25 and in contact with theouter end of the packing ring 24 and a spring 28 yieldingly presses the sleeve in contact with the ring. One end 'of the spring 28 rests against a iange 29 formed on the sleeve 26 and the other end rests against the wall 30 of the inner end of the extension 27. The sleeve 26 is formed with one or more radial fingers or keys 31 which may extend from the flange 29, and these fingers are arranged to slide-in keyways 32 formed lengthwise in the extension 27. Thus the sleeve 26 is prevented from turnin as it slides relative to the shaft 16 and t e spring 28 holds ,in close yielding contact with the packing rmg 24.

It will be understood that the pump casing may be readily removed from the motor casing and at the same time the packing ring parts replaced as before.

` It will be understood that my invention is not limited to the details of construction shown and other forms may be used without departing 'from the spiritA or scope of the invention.

Having thus described my invention, what I claim and desire tosecure by Letters Patent is 1. In a3 pump driving mechanism, the combination with a pump casing, an impeller therein, and a shaft connected to the impeller, of a compressible packing ring around the shaft, a sliding sleeve in contact with the packing ring and keyed to revent turning with the shaft, and a spring caring against the Sleeve and a non-rotating wall to compress said packing ring.

2. In combination with a driving element and a driven element, a commonv shaft connecting said elements, means for preventing the passage of fluid from each of said elements along said shaft in either direction comprising a bearing adjacent each element on said shaft, a common inclosing member extending from one bearing along the shaft toward the other bearing to form an inclosed chamber, means on the shaft adjacent one bearing for interrupting and diverting the fluid carried along the shaft, means at the other end of said chamber for packing the shaft and a spring interposed between said parts and exerting pressure upon said packing to maintain the latter in operative positiom a 3. In combination With a fluid impelling element, a driving element, a common shaft for said elements, a casing for each element in which said shaft is mounted, said shaft having a bearing in each casing, a shell eX'd tending from one casing and'longitudinally of the shaft to a point adjacent to the otherv sleeve having means of engagement With said extended shell to prevent rotation of the former, a compressible packingv in said impeller element casing, said sleeve having contact with said packing and a spring Within said'chamber bearing against said slidingI sleeve.

In testimony whereof I ai'lix my signature.

Geenen L. MCoAiN'. 

